Perhaps you should try some spelling variations:
"international leste economic surveys" » "international best economic surveys", "international list economic surveys", "international tests economic surveys", "international leste economic studies", "international leste economic systems", "international state economic surveys"
"international rice economy series" » "international price economy series", "international prices economy series", "international center economy series", "international rice economics series", "international rich economy series", "international niche economy series", "international rican economy series"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("international leste economic surveys") OR ("international rice economy series"))~.
• Removing quotes may allow a broader search: (( international leste economic surveys ) or ( international rice economy series ))~.
• Adding a wildcard symbol may retrieve word variants: (("international leste economic surveys") or ("international rice economy series"))*.